[JAVA - jaxrs-reasteasy-eap] Add import to models (#179)

Call super management for managing imports in postProcessModelProperty

modules/openapi-generator/src/main/java/org/openapitools/codegen/languages/JavaResteasyEapServerCodegen.java

@@ -147,6 +147,7 @@ public class JavaResteasyEapServerCodegen extends AbstractJavaJAXRSServerCodegen
 
     @Override
     public void postProcessModelProperty(CodegenModel model, CodegenProperty property) {
+        super.postProcessModelProperty(model, property);
         // Add imports for Jackson
         if (!BooleanUtils.toBoolean(model.isEnum)) {
             model.imports.add("JsonProperty");